A 16-25 Railcard costs just £30 and it'll save you 1/3 on rail fares throughout Great Britain for a whole year.
Make a journey using pay as you go on a bus or tram, and you can make a second bus or tram journey for free within one hour of first touching in. You must touch in using the same card on the second bus or tram. Hopper fares apply to adult and discounted rate pay as you go journeys. Find out more about Bus Hopper.